Dust basket



FIG. 1 is a front elevation of a dust basket showing my new design;

FIG. 2 is a right side elevation thereof, the left side elevation being the mirror image of the right side elevation;

FIG. 3 is a rear side elevation thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a dust basket, as shown and described. 